In a statement on the court service website Judge Juliana Leal de Melo of the Fan and Major Events confirmed that she had accepted a recommendation by the public prosecutor Marcus Kac in Brazil.

Mr Hickey, who temporarily stood down as President of the Olympic Council of Ireland following his arrest on August 17, and THG director Mr Mallon have been ordered to appear at the headquarters of the Juvenile Court every 20 days and “justify their activities”.

They are required to observe a curfew from 10pm each night and are also prohibited from attending any events at the Paralympics.

The magistrate also retained the passports of the accused, who are forbidden to leave the country. The judge said that any breach of the precautionary measures will be “preventive detention”.

It is expected that it could be around one and a half years before a court case in Rio de Janeiro reaches fruition. Sources have suggested that the passports of the two Irish men could be returned in this interim, but any such decision rests with the Brazilian judiciary.

Police sources in Brazil last night confirmed that they had been informed of the decision but were awaiting receipt of formal papers.

Mr Mallon's solicitor Franklin Gomes said he too had not received copies of the decision but believed that this was the case.

The judge has ordered the return of passports to Kevin Kilty, Dermot Henihan and Stephen Martin.

Details were published on the official courts service website for Rio de Janeiro.